Piper PA-31-350 Navajo Chieftain

After takeoff from runway 25, at an altitude of 100 feet above ground level, the aircraft pitched up and reached a maximum pitch attitude of 50° to 75°. The aircraft crossed the highway while climbing to an altitude of about 400 feet, 2,000 feet from the departure end of the runway. It then began what witnesses described as a 'wingover' or 'sudden violent nose down turn' to the right, recrossed the highway and crashed in an almost level pitch attitude while in a slight right bank and a slight left yaw. Witnesses to the accident were attracted to the aircraft by the high pitch attitude after takeoff. During the post takeoff maneuver, the engines were reported to be running at a high power setting. The aircraft crashed about one minute after the takeoff roll began; it came to rest in an open field about 1,150 feet past the departure end of the runway and about 650 feet to the right of the runway. The impact heading was 025° magnetic. All 10 occupants were killed, among them Australian tourists.

Crashed in unknown circumstances after takeoff from Puerto Francisco de Orellana Airport, killing all seven occupants.

The pilot, sole on board, was performing a local test flight at Mena Airport. During initial climb, one of the engine failed. He elected to return but misjudged his altitude and clearance when the airplane struck trees and crashed near the airport. The aircraft was destroyed and the pilot was injured.

While in cruising altitude and approaching Indianapolis from the east, the pilot encountered very bad weather conditions. He informed ATC about severe turbulences when control was lost. The twin engine airplane entered a spin and eventually crashed in a field located in Arlington. The aircraft was totally destroyed and all nine occupants were killed, among them seven employees of the United States Auto Club.

The aircraft was based at Moorabbin Airport and, late in foe afternoon of 29.3.78, it was refuelled and a pre-flight inspection was carried out. The pilot ferried it to Melbourne Airport just after midnight. While he was preparing and submitting a flight plan for the flight to Canberra and return, the aircraft was loaded with newspapers and a small quantity of other freight. On returning to the aircraft, the pilot checked the loading documents and the freight and made a walk around inspection of the exterior of the aircraft. The pilot started the aircraft engines and established radio communication with air traffic control at 0139 hours. He was given a taxi clearance and an airways clearance for departure from runway 34. Upon request, he was granted approval to commence take-off from the taxiway "J" intersection, some 800 metres from the southern end of the runway. He reported "ready" at 0143 hours and was immediately given a clearance for take-off. The aircraft commenced to take-off, became airborne and, when it was at a height of 100 to 200 feet above the intersection of the two runways, the pilot advised "got a fire - fire in the ah starboard engine and ah doing a low circuit request two seven". Air traffic control immediately replied "make visual approach runway two seven clear to land". Acknowledgement of this clearance was the last communication received from the aircraft. As the aircraft passed over the northern end of runway 34 it commenced a turn to the right and gradually descended. It struck the ground in a right wing down attitude on a track of 070° magnetic and an intense fire broke out. The accident site was 1.8 kilometres to the north-east, and 88 feet above the elevation, of the northern end of runway 34. At the time of the accident the surface wind was 330°/9 knots, the visibility was 25 km in passing showers, there was 3 oktas stratus cloud base 1800 feet and 6 oktas cumulus cloud base 3500 feet. It is probable that below 1000 feet there was some wind shear, downdrafts from passing showers and intermittent moderate turbulence. It has been calculated that the gross weight of the aircraft was some 65 kilograms in excess of the maximum take-off weight and the centre of gravity was within limits. A detailed examination of the wreckage of the aircraft revealed that the landing gear and flaps were fully retracted, the cowl flaps of both engines were midway between the open and closed positions a considerable degree of nose left rudder trim was selected, the right engine was closed down and the propeller feathered. It was established that, as a result of excessively lean mixture operation, there was a hole burned through the piston rings and into the side of the No. 2 piston of the right engine. There was no evidence of fire within the engine but it was apparent that the hole in the piston had resulted in pressurisation of the crankcase cavity, ejection of the oil dipstick and the consequent venting of oil from the dipstick orifice and the engine breather pipe on to the exterior of the exhaust pipes. The engine had the capacity to continue to produce a substantial amount of power for a limited period. The turbo-charger density controller of the left engine was found to be incorrectly adjusted to the extent that the engine could develop only about 330 BHP instead of 350 BHP of which it was normally capable.

On approach to Anniston Airport, the pilot encountered low ceiling and fog and descended too low when, at an altitude of 1,650 feet, the twin engine airplane struck a mountain located 7,5 miles beyond airport. The aircraft was destroyed and the pilot, sole on board, was killed.

During the takeoff roll on a gravel runway, the nose baggage compartment door opened. After liftoff, the pilot encountered pitch control problems and elected to ditch the aircraft into Lake Minchumina. All six occupants were evacuated, the pilot was seriously injured. The aircraft was written off.

At liftoff, the twin engine rolled to the right and crashed in flames. The aircraft was destroyed by a post crash fire and the pilot, sole on board, was slightly injured.

On final approach to Grand Canyon-National Park Airport, the right engine partially failed and the pilot feathered its propeller. The airplane lost height then crashed on a plateau located few miles from the airport. The pilot and four passengers were killed while four others were seriously injured.

En route from Philadelphia to White Plains with three people on board, the twin engine airplane collided with a Cessna 172 operated by Teterboro Flight Service, registered N75604 and carrying two people. Following the collision, both aircraft went out of control and crashed into the Hudson River near the Tappan Zee Bridge. Both aircraft were destroyed and all five occupants have been killed.